Sirs, The link http://support.microsoft.com/default.aspx?...b;EN-US;Q305184 could be usefull. You will need a DDK compiler to change the code but it is pretty easy! The DEVCON is name dependant and I already found some units that a couldn´t identify. The ENUMCD worked fine for each DVD-ROM, CD-ROM, CD-RW, COMBO or DVD-RW that I already tested. Best Regards O. Villa